Exhaust and signal control.



PATENTED AUG. 18, 1908.

J. 1). MAXWELL.

EXHAUST AND SIGNAL CONTROL.

APPLICATION FILED AUG. 23,1907.

. INVENTORE JONATHAN DM XWE L.

wrmfh-zsses: 90/6 714 ATTCD QNEYS.

JONATHAN D. MAxwE L, or TARRYTOWN, NEW YORK.

- EXHAUST AND SIGNAL 'GONTROL.

Specification of Letters Patent.

Patented Aug. 18, 1968.

Application filed August 23, 1907. Serial No. 389,793.

To all whom it may concern:

Be it known that I, JONATHAN D. MAX- WELL, a .citizen of the United States of America, residin at Tarrytown, in thecounty of Westciester and State of New York, have invented certain new and useful Im rovements in Exhaust and Signal Contro of which the following is a specification,

reference being had therein to the accompanying drawings.

In automobiles, motor boats, and the like, the motor exhaust is frequently used to operate a signal whistle, but the fluctuations in pressure cause unpleasant pulsations and variations in'the pitch and intensity of the sound.- It is also customary to muflie the exhaust when desired.

This inventionrelates to a combinedexhaustand signal controlling means, whereby the intermittent exhaust-pressure may be made to produce a sustained tone in a suitable whistle-bell o r-horn, and whereby the exhaust may be mufiled, allowed to directly escape, or be made to operate the whistle.

The invention consists in the matters hereinafter set forth, and more particularly point ed out in the appended claims.

In the drawings, Figure 1 is a view in longitudinal section of an exhaust and signal controlling mechanism which'embodies the features of the invention. Fig. 2 is a view in side elevation of the device.

Referring to the drawings, the device, in its preferred form of construction, consists of a central pipe 1, exteriorly screw-threaded at one end for attachment to the exhaust of an internal combustion motor, and at the other for a controlling valve casing 2 which is counterbored and fitted to engage the pipe.

The body ofthe pipe isperforated, the orifices having a combined area. slightly less than the cross-sectional area of the pipe, so that'the exhaust is slightly restricted according to established mufiler construction.

An outer closed cylindrical shell 4- and an intermediate cylinder whose body wall 5- is perforate, are concentrically secured on the pipe, their outer end plates 7 and 8 being clamped between lock nuts 9 on the inlet end of thepipe. An inner head plate 10 of the intermediate cylinder is secured againsta circulanmufiler head 11, integral with the valve casing 2 by a nut 12. The corresponding'end of *theshell is closed by the muflier headitself, the shell being secured to a peripheral flange -13 thereon by rivets 14 or the like. I 4

integral, inrolled, rounded peripheral flanges 35 which are retained in corresponding circumferential grooves 15, struck up or rolled in the end portions of the sheet metal cylinder bodies, thus forming a solderless lap joint which retains the parts while allowing for their unequal expansion.

The valve casing 2 is suitably designed and counterbored-for a hollow cylindrical closure 16 with closed ends, secured transversely to the muffler axis by a stud 17 integrally formed on its/lower end, extending through the casing, and a spring 18 encircling the stud, in compression between the casing and a washer and cotter pin 19 on the stud. A lever 20 suitably secured as by a in 21 to a central boss-22 on the head of t 1e closure, rotates it, a stop pin23 travelinglin a gain or notch 24- in the casing or other 'ke means limiting its movement.

A direct exhaust passage 34 leads from the pipe 1 through the muflier head into the interior of the casing and may be thrown into communication with a common discharge opening 25 by a air of apertures 26 and 27 in the cylindrica closure wall, which are so disposed that they may be brought simultaneously into register with the passage and opening by rotation of the closure.

A muffler exhaustduct 28 of less area than the orifices in the intermediate cylinder, leads through the mufller head from the outer shell diagonally into the interior of the casing between the direct exhaust and the discharge, and may be brought into communication with the discharge opening 25 by the aperture 26 which is :large enough to simultaneously register with or uncover both.

* vOr the duct may be connected with a diametrically oppo'site blast duct 29 through both apertures 26 and 27. A sounding bell 30 either of a born or a whistle, is mounted on the outer end of the-casing in axialaline-.

ment with themufller by a central stud 31 on which it has the usual longitudinal screw-.

threaded adjustment. The discharge from the blast duct '29 is operatively directed by a suitable annular casin rim 32 and disk 33 against the whistle bel The three-way valve construction enables the operator either to cut out the muffler or else use the muffler exhaust to sound the whistle. In so doing, the muffler itself owing to the restriction of the exhaust becomes a pressure chamber whereby a constant pressure is maintained and the pulsations of the exhaust are so modified that the discharge therefrom is substantially constant, and an even sustained tone in the whistle is obtained. Another feature of the invention is the compactness of the design, which adapts it especially for automobile and small boat use. Still another advantage is the avoidance of extra parts, the one valve controlling the exhaust in the usual way, and likewise operating the signal, while all outside pipe connections and auxiliary pressure tanks are avoided.

Obviously, the design and details of construction may be varied without de )arting from the spirit of the invention, and do not care to limit myself to any particular form of construction or arrangement of parts except as required by the scope of the appended claims.

What I claim as my invention is 1. An exhaust and signal control, comprising a mufller having a direct and an indirect outlet adapted to maintain a constant back pressure in its contents, when discharging through the indirect outlet, a signaling means and means adapted to operatively comiect the indirect outlet and signaling means, and to close either the direct or indirect outlet independently of the signal.

2. An exhaust and signal control, comprising a muffler having a direct and indirect outlet adapted to maintain a constant back pressure in its contents when discharging through the indirect outlet, signaling means, and means integral with the mufller and signaling means adapted to operatively connect the indirect outlet and signaling means, and to open either the direct or indirect outlet independently of the signaling means.

3. An exhaust and signal control, comprising a muffler having a direct and indirect outlet adapted to maintain a constant back pressure in its contents when discharging through the indirect outlet, signaling means adapted to be operated by the pressure of the muffler contents, and means adapted to operatively connect the indirect outlet and the signaling means, and also to open either the direct or indirect outlet.

4. An exhaust and signal control, comprising a muffler, a direct outlet therefrom, a restricted indirect outlet therein, a signaling means, and controlling means adapted to simultaneously close the direct outlet and operatively connect the indirect outlet and signaling means and also to open either the diroot or indirect outlet independently of the signaling means.

5. An exhaust and signal control comprising a combined exhaust muffler and pressure chamber, a direct exhaust passage therethrough, a restricted outlet therefrom, signalingmeans, and controlling means adapted to simultaneously close the passage and to operatively connect the outlet and signal ing means and to close either the passage or the outlet independently of the signaling means.

6. An exhaust signal and control, comprising a combined exhaust muffler and pressure chamber, a direct exhaust passage therethrough, a restricted outlet therefrom, signaling means, and controlling means integral with the muffler chamber and the signaling means, adapted to simultaneously close the passage and operatively connect the outlet and signal and to close either the exhaust passage or the outlet independently of the signaling means.

7. An exhaust and signal control, comprising an exhaust muffler, a muffler head having a valve casing and blast signal integral thereon, a direct exhaust passage through the muffler head and easing, an indirect exhaust outlet through the head and easing, a signal blast duct in the casing, and a closure, adaptedto connect the outlet and blast duct, and simultaneously close the exhaust passage, and to also alternately open the passage and outlet. 8. An exhaust and signal control, comprising an exhaust mufller having a direct exhaust passage'therethrough, an indirect exhaust passage terminating in a single re stricted outlet, a blast signal, and controlling means adapted to operatively connect the outlet and signal and simultaneously therewith to close the passage and to close either the passage or the outlet independently of 105 the si nal.

9. in exhaust and signal control, comprising an exhaust mufliler consisting of a central perforated open pipe, a concentric perforate cylinder thereon, an outer concentrio shell around the cylinder, having a single discharge outlet of less capacity than the pipe apertures and the cylinder orifices, a blast signal, and controlling means for the outlet passage, adapted to operate the signal.

10. An exhaust and signal control, comprising an exhaust muffler, consisting of a series of concentric, annular compression chambers, having a central, direct exhaust passage, and a single retricted indirect discharge outlet from the outer chamber, signaling means adapted to be operated by the discharge from the outlet, and a signal controlling means for the passage, outlet and signaling means.

11. An exhaust and signal control, comprising an exhaust muffler consisting of a series of concentric, annular compression chambers, having a central, direct exhaust passage, and a'single restricted indirect distrolling valve casing forming a muffler head for the cylinders, a passage from the intake cylinder into the casing, an outlet from the discharge cylinder into the casing, a common discharge from the casing, ablast signal on the casing,.and a closure in the casing adapted to close the passage and simultaneously to operatively connect the outlet with the signal, and to close the passage or the outlet independently of the signal.

13. An exhaust and signal control, comprising an exhaust muffler consisting of an inner open, perforate pipe, a perforate cylin der concentric'with the pipe, an outer imperforate cylindrical shell concentric with the cylinder, a valve casing forming a muffler head for'the pipe and. shell, a passage from the pipe end into the casing, a single re- 1 stricted outlet from the shell into the casing,

a blast signal on the casing, a blast duct from the casing to the signal, a common discharge from the casing and a valve closure adapted to connect the discharge with either the outlet or the passage, or the outlet with the blast duct.

14. An exhaust and signal control, com prising a central, open tube perforated be tween its ends, a sheet metal cylinder concentrically secured around the erforated portion, having sheet metal head s provided with inrolled, rounded integral marginal flanges, interlocking with correspondi peripheral grooves-in the body, secured by ock nuts on the ipe, an outer sheet metal imperforate she concentric with the cylinder, a restricted outlet therefrom, a blast signal, and means controlling the outlet and the pipe, discharge end, adapted toturn the discharge from the outlet through the signal.

15. In an exhaust muflier and signal control, having multiple reduction or compression chambers, rovided with a direct passage and a singlb restricted outlet, a valve casing having a mufller'head integral thereon common to the initial and final chambers, a

blast signal whose sounding bell is secured on tor are integral with the casing, a discharge outlet into the casing from the final chamber, a port from the passage, a common discharge from the casingfand a single closure adapted to connect either the port or the outlet with the discharge, or the outlet with the blast duct.

16. An exhaust and signal control comrising a cylindrical exhaust muffler, a combined muflier head and valve casing therein, having a direct exhaust passage and indirect outlet from the mufller and a common discharge, a blast duct and deflector integral with the casing, a signal sounding bell secured on the casing in longitudinal alinement with the mufller, and a single closure rotatable in the casing, adapted to connect the outlet either with the common discharge or the blast duct, or the direct passage with the common discharge.

17. An exhaust and signal control com rising a cylindrical exhaust muffler, a combined muifler head and valve casing therein, having a direct exhaust passage and indirect outlet from the muflEler and a common discharge, a blast duct and deflector integral with the casing, a signal sounding bell secured on the casing, in longitudinal alinement with the muffler, and a ported cylindrical closure in the casing, rotatably transverse to the mufller in the casing, adapted to connect the outlet either with the common discharge or the blast duct, or the direct passage with the common discharge.

18. An exhaust and signal comprising a cylindrical exhaust mufller, a valve casing, a circular muffler head integral thereon closing one end of the mufiier, provided with a direct .the passage with the discharge and an operating leverfor' the closure.

In testimony whereof I affix my signature in presence of two witnesses.

- JONATHAN D. MAXWELL. 

